Icon Tutorial 01
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(This is basically a coloring tutorial.)

1. Open up your cropped 100 x 100 image. Let's use a picture of Miyavi in this tutorial.

2. Go to Filter >Sharpen > Sharpen to sharpen the image (duh :p). Then duplicate that layer twice by pressing Ctrl + J twice. You now have three layers. On the second layer, set the blending mode to 100% Screen. On the top layer, set the blending mode to 70% soft light. Go to Layer > Merge Visible. You should now have this:

3. Now take this gradient and paste it in a new layer. Set the blending mode to 78% Lighten.

4. Take this gradient and place it in a new layer. Set the blending mode to 100% Soft Light.

5. Take this gradient and place it in a new layer. Set the blending mode to 100% Soft Light.

6. Take this color and place it in a new layer. Set the blending mode to 42% Hue.

7. Take this gradient and place it in a new layer. Set the blending mode to 25% Soft Light.

8. Repeat step 6 but set the blending mode to 100% exclusion.

9. Duplicate your first layer (the one with the picture of Miyavi) and paste it as the top most layer. Set the blending mode to 100% soft light. You should now have this:

10. Now you're basically done. Just add text and whatnot. Voila!